| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a brake device of a hand guide roller with a simple structure that can stop the hand guide roller safely without returning a lever for forward and reverse movement to a neutral position. <P>SOLUTION: The brake device 31 includes a lock pin holder 32 coupled to a frame of a vehicle body and formed with an oil chamber 36 communicating with the outside via a pressurized oil port 35, a lock pin 33 for being slidably inserted into the lock pin holder 32, and a compression coil spring 42 for always biasing the lock pin 33 toward a hook member 44 of a mirror plate 11 of a roll. When an engine is in operation, pressurized oil is charged into the oil chamber 36, and the lock pin 33 is disengaged from the hook member 44 in response to the oil pressure. When the engine is stopped, the supply of the pressurized oil to the oil chamber 36 is stopped, and by a biasing force of the compression coil spring 42, the lock pin 33 is hooked by the hook member 44 to lock rotation of the roll. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
